I want my application to be unsearchable from the App Store. I would like that only those users who sign in to my web site and then click the link of my iPhone application on ap
Not sure if this is going to work, but it may be worth a try:
You can set the release date of the application to the future. This removes the app from the catalog, which is a common way to remove an app temporarily (e.g. when it has problems) until an update appears.
However (this is possibly the catch) I don't know if the app will then be still available for sale via link or if the link will become unusable too.